US5873935AExpiredUtilityPatentIndex 66

Coating color

Assignee: PLUSS STAUFFER AGPriority: Mar 13, 1996Filed: Mar 7, 1997Granted: Feb 23, 1999

Est. expiryMar 13, 2016(expired)· nominal 20-yr term from priority

Inventors:SCHACHENMANN MAX STRAUCH DIETER

C09D 5/028Y10S516/922D21H 19/385D21H 21/52C09D 1/10

PatentIndex Score

Cited by

References

Claims

Abstract

A coating color comprising 28-51% by weight of water, 43-64% by weight of carbonate-containing pigment with a specific particle distribution and a particle diameter of 0.18-0.28 mu m and a specific surface area of 19-26 M2/g and 6-8% by weight of conventional binding agents and additives may be employed with advantage for coated papers. The coating color is produced by wet milling of the carbonate-containing pigment without the addition of dispersing or wetting agents at a solids concentration of 30-20% by weight in an agitating ball mill, subsequent concentration, re-dispersal and the addition of binding agents, water and additives.

Claims

exact text as granted — not AI-modified

We claim: 
     
       1. A coating color composition comprising: 28-51% by weight of water;   43-64% by weight of carbonate-containing pigment with a particle size distribution of 100% &lt;2 μm   94-100% &lt;1 μm   75-94% &lt;0.5 μm   31-59% &lt;0.2 μm with a mean statistical particle diameter (D 50 ) of 0.18-0.28 μm and with a specific surface area of 19-26 m 2  /g (as determined by BET; N 2  ; DIN 66,131); and       6-8% by weight of binding agents and additives.   
     
     
       2. The coating color composition as claimed in claim 1, in which said carbonate-containing pigment is CaCO 3 . 
     
     
       3. The coating color composition as claimed in claim 1, comprising: 29-49% by weight of water;   45-63% by weight of carbonate-containing pigment; and   6-8% by weight of binding agents and additives.   
     
     
       4. The coating color composition as claimed in claim 1, comprising: 31-48% by weight of water;   45-62% by weight of carbonate-containing pigment; and   7% by weight of binding agents and additives.   
     
     
       5. The coating color composition as claimed in claim 1 in which the carbonate-containing pigment has a particle size distribution of: 100% &lt;2 μm   95-99% &lt;1 μm   80-91% &lt;0.5 μm   35-51% &lt;0.2 μm.   
     
     
       6. The coating color composition as claimed in claim 1 in which the carbonate-containing pigment has a particle size distribution of: 100% &lt;2 μm   9- 99% &lt;1 μm   80-91% &lt;0.5 μm   38-51% &lt;0.2μm.   
     
     
       7. The coating color composition as claimed in claim 1, in which the carbonate-containing pigment has a particle size distribution of: 100% &lt;2 μm   96-98% &lt;1 μm   77-89% &lt;0.5 μm   40-47% &lt;0.2 μm.   
     
     
       8. The coating color composition as claimed in claim 1, in which the carbonate-containing pigment possesses a mean statistical particle diameter (D 50 ) of 0.20-0.28 μm. 
     
     
       9. The coating color composition as claimed in claim 1, in which the carbonate-containing pigment possesses a mean statistical particle diameter (D 50 ) of 0.22-0.27 μm. 
     
     
       10. The coating color composition as claimed in claim 1, in which the carbonate-containing pigment has a specific surface area of 20 to 25 m 2  /g. 
     
     
       11. The coating color composition as claimed in claim 1, in which the carbonate-containing pigment has a specific surface area of 21 to 24 m 2  /g. 
     
     
       12. A method for the production of a coating color, comprising: (a) without the addition of dispersing or wetting agents, wet milling the carbonate-containing pigment at a solids concentration of 20-30%, in an agitating ball mill with recirculation, to a final fineness of 100% of particles &lt;2 μm   94-100% of particles &lt;1 μm   75-94% of particles &lt;0.5 μm   31-59% of particles &lt;0.2 μm a mean statistical particle diameter (D 50 ) of 0.18-0.28 μm and a specific surface area of 19-26 m 2  /g;     (b) concentrating the carbonate pigment suspension obtained in (a) to a solids content of 63-65% by weight and re-dispersing the concentrated suspension with a dispersant; and   (c) mixing the coating color with binding agents, water and additives.   
     
     
       13. The method as claimed in claim 12, in which said solids concentration is 21-26% by weight. 
     
     
       14. A method for applying color to a coated paper, comprising applying to said paper a coating color composition as claimed in claim 1. 
     
     
       15. A method for applying color to a high quality gloss paper, comprising applying to said paper a coating color composition as claimed in claim 1. 
     
     
       16. A method for applying color to a board paper, comprising applying to said paper a coating color composition as claimed in claim 1.

Cited by (0)

No later patents cite this yet.

References (0)

No backward citations on record.